Ratchet mechanism.



G. 0. LEOPOLD.

RATCHET MECHANI'SM. APPLICATION man JAN.2,1913.V

1,286,36U- Patented Dec. 3, 1918.

i 1, i fg.

Philadelphia,

\ Be it knownthatl, GEORGE `Grenen o. LEeicLn,` or rnrtanntrnrn, r

EnEsYLvAnIA, Assiettes roivonrn BEos More e0., OFUEHILADELPnrA,.rnnnsrnvnivrm A conroianrronion rENNsYL VANIA. y.

mecano.

To all whom it may concern:

. which a shaft is to be turned in either direction by reciprocating anarm. y y ,y The object of my` inventionisto makegthe ratchet mechanismso that the pawl can be shifted to either of its twopositions and" canbe frictionally held in either position.

The invention also relates to `meansfor 4 withdrawing the pawl andholding itout of `Contact. with the ratchet wheel while 1it `is beingreversed. y .t i,

In the accompanying drawings: ,y Figure 1 is a plan view showing my`nnproved ratchet mechanism gf y i Fig. 2 is a plan view partly insection Fig. 3 is a longitudinalsectional )view on `the line 3 3, Fig.1;

Fig. 4 is a transverse vsectionalvimon"the line 4 4, Fig. 3;

Fig.5 is a transverse sectionaljview on the line 5-5, Fig. 3;

Fig. 6 is a `detached perspective view of the pawl carrier and theshowing the pawlcarrier and pawl inthe act of being turned to reversethemovement.

Referring to the drawings, lis the bear#` ing.` 2 is amratchet wheelhaving teeth,`as clearly shown `in the` drawingt" This wheel is; mountedin the bearing and [may be con nected to any mechanism which isrequiredto be turned in either direction, such :as a

lifting jack, but it will be understoodthat the devicel can be used `inconnection with any mechanism requiring a ratchet device.

3 is the casing, which is mounted-on `the ratchet wheel 2 and is heldagainst the bearing by a washer 4 and a screw 5,`in` the presentinstance. Mounted in the casing is a carrier 6, as clearly shownindetail`- in Fig. 6, having a socket 7 for the end of a handle 8. Thecarrier is notched at`9 to receive a pin 10 so as to prevent the handlefrom turning in the socket. The carrier 6 has a reduced portion 11,which fhas an annular groove 12 therein adapted to receive EATCHETMEcnnnisM;

t j specriato of Letters raten-t. i Application flied January 2,1918.

LEOPOLD, a

of which` the following is a specili- `is a longitudinal,sectional;view` 1 order to frictionally lcckthe carrier indicate `whenthe pawl is t ratelijteti nee. e, 1ere. Seria1No."209,8`61. i 1 i t pinllocated in an opening in the casing 3 sozas to prevent thewithdrawalfof the carrierfrorn the casing. In the inner end of thecarrier is acylindrical `socket 18 adaptedto receive the spindle 14 ofthe pawl 15. e rilhepawlhas a head 16 in the form ofa disk whichts theopening; in the` casing and has `atransverse tooth 17 "arranged to"`engage `the 1 teeth of` the ratchet wheel 2.. The tooth is lstraight onone side the end ofa screw and is beveled ou thetopposite` side and canbe turned to the position shown inFg. l to ratchet the wheel` 2 in ,the5 direction of the arrow, Fig. 3, or it can be"`reversed soas to`ratchet the wheelin the opposite direction. "On the ,spindle 14 ofthepawl 15.;is a pin 19, which extends intothe slot `20 in the carrier``so as to prevent the pawl from turningindependently of` the` carrier.Located `back of thespmdlein `the socket 1,8 isa spring 21, which tendsto force the `its normal position thepin `19 is in the narrow portion ofthe slotq20`, asclearly shown t 80 v t pawl out against Athe ratchetwheel, `and when the pawl is in either of itstwo posiinto the enlargedporto hold theI pawlinxthefretracted position,

`while *the carrier is `being turned 3 ande, and mountedin a socket inthe carrieris a .ball 25, vheld in "its projected `positionbya spring26,. ,The

outer end to` etached the casing. Suitableindicating marks, such astheletters U.and D are formed on `the enlarged portion of the carrierso aslto in the position to jaick upward or downof the socket is slightlycontracted ratchet the lifting ward. j t y When the parts are in theposition" shown in Fig. 3, the ball 25 extends into thenotch 23 inthecasing andthe pawl is in engage- `ment `with the ratchetwheel2 so `thecarrier is forced downby bearingiupon t t ,9o notches 1n thejinteriorofthe casing, as at f sus` Prevent the ball` from becoming` when thecarrier 1s removedfrom i that when t the handle 8, the springallows thepawlzto ratchet over the teeth of` the wheel 2 and 25 being forced intothe socket and when theu ball 25 is opposite the socket 2a it drops intoposition and this movement first withdraws the pawl by the inclinedportion of the teeth 17f bearing against the teeth of the ratchet wheel,which forces the pin 19 of the pawl into the enlarged portion 22 of theslot inthe carrier so that as the carrier is turned the pin is held inthe enlarged portion of the slot by the inclined walls of the slot sothat the pawl is clear of the ratchet wheel, thus allowing the carrierto be turned freely from one position to the other, but as soon as thecarrier is in position for the balls 25 to enter the notch 24 in thecasing, the pawl will be projected in position to ratchet the wheel 2 inthe opposite direction to the arrow, lFig. 3.' i

I claim:

l; The combination in ratchet mechanism, of a ratchet wheel; a pivotallymounted casing; a carrier mounted in the casing;

a pawl having ra tooth arranged to engage the teeth in the ratchetwheel; a spring back of the pawl; means for preventing the pawl fromturning in the carrier when the handle is reciprocated, said meanswithdrawing the pawl from engagement with the ratchet teeth when thecarrier is turned in the casing to reverse the position of the pawl.

2. The combination in ratchet mechanism,

o'fa ratchet wheel; a casing mounted on the wheel; a carrier located inthe casing; a handle attached to the carrier, said carrier havingasocket; a headed pawl having a spindle adapted to the socket; a springlocated in the socket back of the pawl, the pawl having atransversetooth arranged to enga-ge the teeth of the ratchet wheel; a longitudinalslot in the carrier; and a pin on the spindle of the pawl adapted to theslot so thatwhen the carrier is turned the pawl Copies of this patentmaybe obtained for will yield and the tooth of the pawl will ride overthe teeth of the ratchet wheel.

3. The combination of a ratchet wheel; a casing mounted on the ratchetwheel; a car-- rier located ini the casing and having a socket; a pawlhaving a cylindrical head and a cylindrical spindle, said spindle beinglocated in the socket in the carrier; a spring in the socket back of thepawl, said pawl having a transverse tooth arranged to enter the teeth ofthe ratchet wheel, the carrier having a slot; a pin on the spindle ofthe pawl arranged to enter the slot, said slot being enlarged and havinginclined walls so that when Vthe pawl is pushed in, on turning thecarrier, the pin will enter the enlarged portion of the slot, and, oncontinuing the turning, the pawl will be held in the vretracted positionagainst the pressure of ythe spring so that the carrier and the pawl canbe freely turned into either of its two positions.

A 4L. rlhe combination in ratchet mechanism, of a ratchet wheel; abearing in which the wheel is mountedga casing mounted to turn freelyIon the ratchet wheel, said casing havinga cylindrical chamber therein;a carrier having a cylindrical reduced portion adapted to the chamber inthe casing; moans for holding the carrier against longitudinal movement,the casing having two internal notches; a spring-pressed ball in thecarrier adapted to enter either one of the notches, a. carrier having asocket in its inner end and having a slot communicating with the socket,said slot being enlarged at its inner end; a pawl having a spindlemounted in the socket and having a head adapted to the cylindricalchamber in the casing; a pin on the spindle arranged to iit the narrowportion of the notch when the pawl is projected and arranged to enterthe enlarged portion of the notch when the pawly is forced in, onturning the carrier.

In witness whereof I a-iiix my signature.

GEORGE O. LEOPOLD.

ve cents each, by addressing the Commissioner of Patents,

n Washington, D. C.

